I have sold many many items on eBay. Their fees are so much lower than 30%. I have a couple of "secrets" to stop the non paying bidders, fears of Bait & Switch, and getting too many returns.
First, allow returns, but in the Detailed Return area of the listing charge a 10% or 20% re-listing fee. Many people don't even look at this prior to purchase, but it mostly stops the Buyers Remorse returns once they have purchased the item and then actually look at your Return Policy.
Second, to stop the Bait & Switch, state in your listing that you will have a "Security Tag" attached to the handbag, charm, slg or scarf and if removed, it can not be returned. (Then I really don't have a security tag), but it stops these people from buying.
Third, do not use the Auction way of selling, and slightly overprice your item. Use the Buy It Now and you can allow offers if you wish. That gives you the control. If the person making an offer leaves unnecessary negative feedback for previous purchases, just decline their offer and stay away from them.
Fourth, be sure to post all pictures needed to authenticate your item on tpf. Then state in your listing to have your item authenticated at tpf or caroldiva.com.
Now don't get me wrong, I much prefer buying from Yoogi's &
Fashionphile, but I love the profits that I keep for myself selling on eBay.
Hope this helps.